Governor.



A. D AVIS.

GOVERNOR.

APPLICATION FILED FEB. 8, 1907.

902,278. Patented 0ct.27,1908.

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ex 7 i 36 -a1 m A I 751M WJ I UNITED STATES PATENT OFFICE,

AUGUSTINE DAVIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO DAVIS AOETYLENECOMPANY, OF ELKHART, INDIANA, A CORPORATION OF SOUTH DAKOTA.

Patented Oct. 27', 1908.

GOVERNOR.

No. 902,278. Specification of Letters Patent.

Application filed February 8, 1907. Serial No. 256,431.

To all whom it may concern:

Be it known that I, AUGUSTINE DAvIs, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Governors, of which the1 pressure of the gas in the generation chamber so as to automaticallyarrest the operation of the motor when the bell reaches a predeterminedheight or the gas a predetermined pressure, and to automatically releasethe rfnpltor as the bell descends or the pressure I have found inpractice that the sudden release of the motor from an idle or inactivestate is apt to produce a renewal of the feed of the carbid in excess ofwhat is needed or desirable; and this results in comparatively largevariations and fluctuations in the gas pressure. The object of myinvention, therefore, is to provide a governing devicefor the motors ofacetylene generators and similar devices wherein the actionof thegovernor shall be such as to gradually release the motor as the belldescends or the gas pressure falls from a predetermined height or point,thus feeding to the generation chamber only the amounts of carbidrequired to produce the normal amount and pressure of gas desired, andin comparatively even and uni form quantities. The device is especiallyuseful and applicable in connection with generators using anon-expansible generation chamber, such as is herein shown to illustratean ap lication of the invention.

In t e accompanying drawings,-Figure 1 is a side elevation, partly invertical section, of a carbid feed mechanism set in the upper end of thegenerator with my improved governor applied thereto; and Fig. 2 is aside elevational view of the governor device.

First briefly describing such parts of an acetylene generator and carbidfeed mechanism as are herein shown for the purpose of illustrating oneapplication of my invention, designates the upper portion or neck of thegenerator having an annularly grooved ring 11 at its upper end, in whichis set a carbid hopper 12 provided at its upper end with a cover 13having on its under side a circular rib 14 fitting in the groove of thering 11, a suitable gasket between the parts being provided. The cover13 has a central opening or mouth adapted to be closed by a cap 15maintained in position in a manner to also hold the cover 13 in place bymeans of a yoke 16 having fingers 17 engaging the under surface of ring11, and having a screw 18 passing through the center of the yoke andpressing against the top of cap 15. The lower end of the hopper 12 has acarbid-feeding mouth beneath which is located a carbid feed wheel 19mounted on a shaft 20 suspended by brackets 21 from the hopper 12. 22designates a weighted door or valve pivoted to the wall of the feedopening and extending to the surface of the feed wheel 19, andautomatically operating to regulate the amount of carbid fed by thewheel 19.

Referring now more particularly to those parts wherein my presentinvention is embodied, 23 is a conventional designation of any ordinaryspring-actuated clockwork motor, of a type such as is shown, forexamplefin Letters Patent to Augustine Davis, No. 719,091, grantedJanuary 27, 1903, the main shaft 2 1 of which is connected by a flexiblecoupling 25 with the feed wheel shaft 20. 26 may designate the fly-shaftof the motor that is connected with the main shaft 24 by means of anordinary clockwork speed train, such as is shown and described in theLetters Patent aforesaid, which flyshaft, of course, rotates at a highspeed relatively to the speed of the main shaft 24 when the motor is inoperation. Fast on the flyshaft 26 is a brake-wheel in the form of acup-shaped disk 27, in which are pivoted at diametrically oppositepoints 28 and 29 a pair of curved weights 30 and 31, preferably of suchshape as to conform on their outer faces to the curved inner wall of therim of the disk 27. These weightshave formed on their outer sideslugs 32and 33 adapted to play back and forth in apertures 34 and 35 formedthrough the circular rim of the disk 27.

Tapping the wall 10 of the generation chamber above the motor 24 is anelbow pipe 36, the vertical member of which is supported in a suitablebracket 37 secured to the wall of the chamber, such pipe 36communicating at its upper end with a diaphragm chamber 38 containing adiaphragm 39, which latter is connected by a link 40 with a lever 41 inturn pivoted to a lug 42 mounted on the diaphragm chamber. The other endof the lever 41 is connected as by a link 43 with the upper end of abrakeband 44, which latter underlies the brake-wheel 27 and is connectedat its other end to a suitable pin 45 projecting from the casing of themotor 23.

In the operation of the device, so long as the motor is feeding thecarbid in proper quantities to the underlying generation chamber and thepressure is below the predetermined limit, the diaphragm 39 is notraised sufficiently to apply the brake-band 44 to the brake-wheel 27,and the latter is therefore idle so far as its controlling effect on themotor is concerned. When, however, the pressure suddenly rises to orabove the maximum limit intended, the lever 41, actuated by thediaphragm 39, raises the brakeband 44 and applies it to the brake-wheel27,

thus arresting the operation of the motor and consequently stopping thefurther feed of the carbid. Thereupon the gas pressure falls, and as thepressure of the brake-band 44 on the brake-wheel is released, the motorwould normally start up again at full speed, which wouldresult in anundesirable and sudden increase in the amount of carbid to be fed to thegenerator. This undesirable operation is prevented in the device shownby reason of the fact that as soon as the motor begins to speed up owingto the release of the brake, the weights 30 and 31 are urged outwardlyby centrifugal action, thus throwing the lugs 32 and 33 into frictionalengagement with the brake-band and automatically arresting and checkingthe high speed of the motor. This auxiliary braking mechanism, however,permits the motor to operate the carbid feed to a suflicient extent torestore the normal working of the apparatus and the normal generation ofgas. It will thus be seen that the device of my invention prevents thecreation of sudden excessive gas pressures thereby.

Although I have shown and described the device of my invention asapplied to the motor of an acetylene generator, yet it will beunderstood that it is not limited to this particular art, but may beused to advantage in any situation wherein the described control 0f themotor and the part or parts driven thereby is desired.

I claim:

1. In a governor, the combination with abrake-disk and a brake-bandtherefor, of a centrifu ally-actuated weight mounted on said braiG-(llSk having a part adapted to be projected beyond the periphery ofsaid brake-disk under abnormal speed into engagement with saidbrake-band, substantially as described.

2. In a governor, the combination with a cup-shaped brake-disk having anapertured rim, and a brake-band therefor, of a centrifugally-actuatedweight pivotally mountedin said brake-disk and provided with a lugadapted to be projected under centrifugal action through said apertureof the brakedisk and into frictional engagement with said brake-band,substantially as described.

3. In a governor, the combination with a cup-shaped brake-disk having inthe rim thereof at diametrically opposite points a pair of apertures,and a brake-band therefor, of a pair of centrifugally-actuated weightspivotally mounted in--said brake-disk, said weights being provided ontheir outer sides with lugs adapted to be projected under centrifugalaction through said apertures of the brake-disk and into frictionalengagement with said brake-band, substantially as described.

AUGUSTINE DAVIS. Witnesses SAMUEL N. POND, FREDERICK C. GooDwIN.

